What is CVE-2021-21725?

CVE-2021-21725 is a medium-severity vulnerability in ZTE Zxhn H196q, classified under Incorrect Authorization. CVSS score: 5.7/10. Published 2021-03-05.

How severe is CVE-2021-21725?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Auth bypass in ZTE Zxhn H196q

CVE-2021-21725

A ZTE product has an information leak vulnerability. An attacker with higher authority can go beyond their authority to access files in other directories by performing specific operations, resulting in information leak. This affects: ZXHN H196Q V9.1.0C2.

Vulnerability class: Broken Access Control

Published 2021-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

ZTE Zxhn H196q
ZTE Zxhn H196q Firmware — versions 9.1.0c2
Zxhn H196q — versions V9.1.0C2

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

support.zte.com.cn/support/news/LoopholeInfoDetail.aspx (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21725?: CVE-2021-21725 is a medium-severity vulnerability in ZTE Zxhn H196q, classified under Incorrect Authorization. CVSS score: 5.7/10. Published 2021-03-05.
How severe is CVE-2021-21725?: Medium severity. CVSS v3 base score is 5.7 out of 10.